I just came across my notes from last Spring on 2 stage least squares models (a particular kind of regression in econometrics that I may have to be using in a month or two for my latest paper) and about half the page is covered in odds calculations (done by hand) as the previous night I got busted out in a tournament when my aces were cracked by AQ (the AQ flopped a straight, we were all in pre-flop). I learned a lot from that class.